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Date:   Fri, 15 May 2020 08:18:04 -0700
From:   Alexei Starovoitov <>
To:     Daniel Borkmann <>
Cc:     Alexei Starovoitov <>, bpf <>,
        Network Development <>,
        Linus Torvalds <>,
        Masami Hiramatsu <>,
        Brendan Gregg <>,
        Christoph Hellwig <>,
        John Fastabend <>,
        Yonghong Song <>
Subject: Re: [PATCH bpf v2 0/3] Restrict bpf_probe_read{,str}() and
 bpf_trace_printk()'s %s

On Fri, May 15, 2020 at 3:11 AM Daniel Borkmann <> wrote:
> Small set of fixes in order to restrict BPF helpers for tracing which are
> broken on archs with overlapping address ranges as per discussion in [0].
> I've targetted this for -bpf tree so they can be routed as fixes. Thanks!
> v1 -> v2:
>   - switch to reusable %pks, %pus format specifiers (Yonghong)
>   - fixate %s on kernel_ds probing for archs with overlapping addr space
>   [0]

Applied to bpf tree. Thanks
We'll send pr to Dave soon to hopefully get this and other fixes
into 5.7 before Sunday rc.

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